The server connects to a BIND DNS server. However, this CNAME issue apparently has been a problem for a long, long time as noted in the link Eric provided.

Jeff

On 11/30/2017 9:55 AM, Chris wrote:
Is the server that is having the issues using djbdns or BIND?  There was a thread on June 21 that discussed the differences in the way djbdns handles CNAMES and EDNS, vs the way BIND does, and why it causes delivery issues for qmail.

-Chris

On Wed, Nov 29, 2017 at 9:02 PM, Eric Broch <ebr...@whitehorsetc.com <mailto:ebr...@whitehorsetc.com>> wrote:

    I'll see if I can have a patched version for separate download out
    tomorrow. It's interesting that I never see these errors on my
    servers. How often do you see them, and is mail not delivered?


    On 11/29/2017 9:24 PM, Jeff Koch wrote:
    Hi Eric:

    I read the link you provided and agree with the patch to remove
    the CNAME lookups. Jeff

    On 11/29/2017 11:05 PM, Eric Broch wrote:

    Hi Jeff,

    I've been reading some about this and on one site
    <https://lists.gt.net/qmail/users/138190> Dan Bernstein
    recommended in 2012 or there about that the CNAME lookup should
    be commented out in the code. I might do this and make it
    available sometime soon.

    Eric



    On 11/29/2017 8:44 PM, Jeff Koch wrote:

    Hi Group:

    We are seeing some errors like this in the qmail logs:

    2017-11-23 17:14:55
    info msg 6891411: bytes 3794956 from <pmaldon...@eurostaga.com>
    <mailto:pmaldon...@eurostaga.com> qp 27142 uid 89
    starting delivery 144153: msg 6891411 to remote
    mroval...@prevenir.com.ec <mailto:mroval...@prevenir.com.ec>
    delivery 144153: deferral:
    CNAME_lookup_failed_temporarily._(#4.4.3)/

    Doing a little research says that it's often resolved by
    installing the big dns patch - but I believe QMT already has
    that patch. Could anything else cause this error?

    Also, why is qmail even trying to do a CNAME lookup when the MX
    record is what's needed ?

    Jeff

-- Eric Broch
    White Horse Technical Consulting (WHTC)


-- Eric Broch
    White Horse Technical Consulting (WHTC)



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